* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Open Sans';
    -webkit-appearance: none;
}


.wrapper {
    height: 100vh;
    width: 100%;
    position: absolute;
    background:url("https://kvzjj-guli-1001.oss-cn-shanghai.aliyuncs.com/edu/background_img1.png") 100% 100%;
}
h1 {
    margin-bottom: 1.5%;
    color: #000000;
    font-weight: normal;
}
.container {
    width: 465px;
    position: relative;
    margin:auto;
    margin-top: 100px;
    background: #f3f3f3;
    border-radius: 6px;
}

.container .header_container{
    width: 96%;
    margin: auto;
}
.header_container .header_left{
    height: 50px;
}
.container .header_container .fa-list{
    cursor: pointer;
    margin-top: 10px;
}
.header_container .header_left .fa-history{
    float: right;
    margin-top: 12px;
    /*cursor: pointer;*/
    opacity: 0;
}
.input_container input{
    width: 95%;
    border: 0;
    background: #f3f3f3;
    margin-left: 20px;
    color:#000000;
    font-weight: bolder;
}
.input_container .res_in{
    height: 72px;
    font-size: 35px;
}
.input_container .degree_bot{
    height: 72px;
    font-size: 35px;
    color: #a39d9e;
}
.input_container .his_in{
    height: 34px;
    margin-bottom: 20px;
}
.input_container input:focus-visible{
   outline: none;
}
.row{
    text-align: center;
}
.button{
    width: 19%;
    height: 30px;
    margin: 0.5px 0.1px 0.5px 0.10px;
    background: #f9f9f9;
    text-decoration: none;
    border-style: inset;
    border-radius: 3px;
    cursor: pointer;
}
.button:hover{
    background:#f3f3f3;
}
.del:hover{
    background: red;
}
.calculate:hover{
    background: #0d569f;
}
.digital{
    background: #ffffff;
}
.calculate{
    background: #0067c0;
}
.del{
    background: #dd001b;
}
.container .b2{
    width: 21%;
    height: 40px;
    margin: 2px 5px 2px 5px;
}
.demonstration{
    margin-left: 8px;
    color: #747070;
}
.date-text{
    margin-top: 6px;
    margin-bottom: 6px;
}
.date_res{
    color: #747070;
}
.input_container .date_input{
    height: 40px;
    font-size: 20px;
}
.opt{
    width: 19%;
    height: 30px;
    margin: 0.5px 0.1px 0.5px 0.10px;
    background: #f9f9f9;
    text-decoration: none;
    border-style: inset;
    border-radius: 3px;
    opacity: 0;
}
.b3{
    margin: 4px 20px 4px 20px;
}